Dual-polarization two-dimensional multi-beam antenna array

Abstract

The invention discloses a dual-polarization two-dimensional multi-beam antenna array. The antenna array comprises an upper dielectric plate and a lower dielectric plate. The antenna array aperture adopting differential feeding and the horizontal polarization feed network are located on the upper dielectric plate. The vertical polarization feed network is located on the lower dielectric plate, thehorizontal polarization feed network and the vertical polarization feed network are vertically arranged, an excitation port of the horizontal polarization feed network is a horizontal polarization differential excitation pair, and an excitation port of the vertical polarization feed network is a vertical polarization differential excitation pair; the aperture of the antenna array comprises an SIWcavity, 2*2 antenna units are etched in the SIW cavity, and each antenna unit is composed of a microstrip patch and a grounding through hole short-circuited with the lower dielectric plate. The antenna array disclosed by the invention adopts differential feeding, and an antenna pattern has very low cross polarization level and port isolation during scanning, so that the polarization diversity performance of the antenna array can be improved, and the signal-to-noise ratio of a system is reduced.

Description

technical field [0001] The invention belongs to the field of wireless communication, in particular to a dual-polarized two-dimensional multi-beam antenna array using differential feeding in the field. Background technique [0002] With the increase of users' demand for wireless communication and the continuous improvement of communication quality requirements, dual-polarized multi-beam antennas have become one of the hotspots in the field of antenna research because of their anti-multipath loss, anti-interference, and increased channel capacity. In the traditional dual-polarized multi-beam array antenna design, because the antenna unit often uses common units, the cross-polarization level of the antenna is very high, and the cross-polarization level will gradually increase with the beam scanning, deteriorating the system performance . Since two-dimensional multi-beam arrays can increase system capacity through space and polarization diversity, which will play a very importa...

AI Technical Summary

Problems solved by technology

In the traditional dual-polarized multi-beam array antenna design, because the antenna unit often uses common units, the cross-polarization level of the antenna is very high, and the cross-polarization level will gradually increase with the beam scanning, deteriorating the system performance

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